A: RNA
B: DNA
C: protein
D: lipid
举一反三
- In the 1940s Avery, MacLeod, and McCarty extended Griffith's transformation experiment. Which of the following was determined to be the genetic material that was transformed? A: DNA B: enzymes C: polysaccharides D: protein
- At the onset of infection, the virus introduces into the cell its genetic material —RNA or DNA— accompanied in many instances by essential proteins.
- The function of RNA primer is A: to separate DNA double helix B: to provide 3′-OH to synthesize DNA molecule C: to provide 5′-P to synthesize DNA molecule D: to provide 5′-P to synthesize RNA molecule E: to activitate DNA pol
- When bacteria take up naked genetic material from the surrounding environment, this is called... A: transformation B: transduction C: conjugation D: vertical gene transfer
- The<br/>transfer of genetic material between bacteria in direct physical<br/>contact is called() A: conjugation B: transformation C: transduction D: lysogenic<br/>conversion E: mutation
内容
- 0
In 1953, Watson and Crick found that: A: Two polynucleotide chains form double helix structure of DNA by hydrogen bond linkage B: DNA replication is semi-conservative and usually form heteroduplex DNA consisted of one parental chain and one daughter chain C: Three continuous nucleic acids consist of a genetic code D: Genetic material is usually DNA instead of RNA
- 1
A DNA library is… A: An international storehouse of all DNA data that has been collected to date B: The entire genetic code of human beings from the human genome project C: All the plasmids in a bacteria D: All the genes in a bacteria E: A collection of cloned DNA pieces
- 2
Conjugation is the process of genetic recombination caused by bacteria through the temporary communication of cells and the transfer of genetic material.
- 3
Genetically modified foods (GM foods), also known as genetically engineered foods (GE foods), or bioengineered foods are foods produced from organisms that have had changes introduced into their ________ using the methods of genetic engineering. A: RNA B: DNA C: Protein D: Chromosome
- 4
Translation results in the formation of A: mRNA B: tRNA C: rRNA D: A protein molecule